Luminic Light Meter

Accurate light meter for iPhone. Aperture priority, shutter priority, spot metering, multi-lens zoom, exposure compensation, and calibration. Built for film shooters.

A light meter for iPhone. Point it at a scene and get exposure readings — aperture, shutter speed, and ISO.

Accurate to within 1/3 stop, tested against pro DSLR meters.

MODES • Aperture priority — set your aperture, get the matching shutter speed. • Shutter priority — set your shutter, get the matching aperture. Scroll through equivalent exposure pairs to pick the combination you want.

READING LOG Save readings as you work. Tap LOG, then press MEASURE — each reading is stored with aperture, shutter, ISO, timestamp, and a thumbnail of the scene. Long-press LOG to open the history. Up to 50 readings. Swipe to delete, or clear all at once.

OTHER FEATURES • Spot metering — meter only the center of the frame. • Exposure compensation — brighten or darken the preview before metering. • Pinch to zoom. Switches between ultra-wide, wide, and telephoto on supported iPhones. • Calibration — trim readings by up to ±2 EV in 1/3 stops to match your own gear. • LCD display inspired by the handheld meters of the 80s and 90s.

WORKS OFFLINE No ads, no tracking, no account, no network required.

PRIVACY Luminic does not collect or transmit any data. The camera is used only to measure brightness. Reading log entries — including optional thumbnails — are stored only on your device.